0081f96ecd
don't have it. Some partitioning schemes, as well as file systems, operate on the geometry and without it such schemes (e.g. MBR) and file systems (e.g. FAT) can't be created. This is useful for memory disks.
146 lines
4.9 KiB
C
146 lines
4.9 KiB
C
/*-
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* Copyright (c) 2006, 2007 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _GEOM_PART_H_
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#define _GEOM_PART_H_
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#define G_PART_TRACE(args) g_trace args
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#define G_PART_PROBE_PRI_LOW -10
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#define G_PART_PROBE_PRI_NORM -5
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#define G_PART_PROBE_PRI_HIGH 0
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enum g_part_alias {
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G_PART_ALIAS_EFI, /* A EFI system partition entry. */
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G_PART_ALIAS_FREEBSD, /* A BSD labeled partition entry. */
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G_PART_ALIAS_FREEBSD_SWAP, /* A swap partition entry. */
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G_PART_ALIAS_FREEBSD_UFS, /* A UFS/UFS2 file system entry. */
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G_PART_ALIAS_FREEBSD_VINUM, /* A Vinum partition entry. */
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G_PART_ALIAS_MBR, /* A MBR (extended) partition entry. */
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/* Keep the following last */
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G_PART_ALIAS_COUNT
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};
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const char *g_part_alias_name(enum g_part_alias);
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/* G_PART scheme (KOBJ class). */
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struct g_part_scheme {
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KOBJ_CLASS_FIELDS;
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size_t gps_entrysz;
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int gps_minent;
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int gps_maxent;
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};
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#define G_PART_SCHEME_DECLARE(s) DATA_SET(g_part_scheme_set, s)
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struct g_part_entry {
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LIST_ENTRY(g_part_entry) gpe_entry;
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struct g_provider *gpe_pp; /* Corresponding provider. */
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off_t gpe_offset; /* Byte offset. */
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quad_t gpe_start; /* First LBA of partition. */
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quad_t gpe_end; /* Last LBA of partition. */
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int gpe_index;
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int gpe_created:1; /* Entry is newly created. */
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int gpe_deleted:1; /* Entry has been deleted. */
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int gpe_modified:1; /* Entry has been modified. */
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};
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/* G_PART table (KOBJ instance). */
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struct g_part_table {
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KOBJ_FIELDS;
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struct g_part_scheme *gpt_scheme;
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struct g_geom *gpt_gp;
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LIST_HEAD(, g_part_entry) gpt_entry;
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quad_t gpt_first; /* First allocatable LBA */
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quad_t gpt_last; /* Last allocatable LBA */
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int gpt_entries;
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/*
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* gpt_smhead and gpt_smtail are bitmaps representing the first
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* 32 sectors on the disk (gpt_smhead) and the last 32 sectors
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* on the disk (gpt_smtail). These maps are used by the commit
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* verb to clear sectors previously used by a scheme after the
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* partitioning scheme has been destroyed.
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*/
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uint32_t gpt_smhead;
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uint32_t gpt_smtail;
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/*
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* gpt_sectors and gpt_heads are the fixed or synchesized number
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* of sectors per track and heads (resp) that make up a disks
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* geometry. This is to support partitioning schemes as well as
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* file systems that work on a geometry. The MBR scheme and the
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* MS-DOS (FAT) file system come to mind.
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* We keep track of whether the geometry is fixed or synchesized
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* so that a partitioning scheme can correct the synthesized
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* geometry, based on the on-disk metadata.
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*/
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uint32_t gpt_sectors;
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uint32_t gpt_heads;
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int gpt_depth; /* Sub-partitioning level. */
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int gpt_isleaf:1; /* Cannot be sub-partitioned. */
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int gpt_created:1; /* Newly created. */
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int gpt_modified:1; /* Table changes have been made. */
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int gpt_opened:1; /* Permissions obtained. */
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int gpt_fixgeom:1; /* Geometry is fixed. */
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};
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struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t,
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quad_t);
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/* G_PART ctlreq parameters. */
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#define G_PART_PARM_ENTRIES 0x0001
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#define G_PART_PARM_FLAGS 0x0002
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#define G_PART_PARM_GEOM 0x0004
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#define G_PART_PARM_INDEX 0x0008
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#define G_PART_PARM_LABEL 0x0010
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#define G_PART_PARM_OUTPUT 0x0020
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#define G_PART_PARM_PROVIDER 0x0040
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#define G_PART_PARM_SCHEME 0x0080
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#define G_PART_PARM_SIZE 0x0100
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#define G_PART_PARM_START 0x0200
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#define G_PART_PARM_TYPE 0x0400
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#define G_PART_PARM_VERSION 0x0800
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struct g_part_parms {
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unsigned int gpp_parms;
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unsigned int gpp_entries;
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const char *gpp_flags;
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struct g_geom *gpp_geom;
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unsigned int gpp_index;
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const char *gpp_label;
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struct g_provider *gpp_provider;
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struct g_part_scheme *gpp_scheme;
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quad_t gpp_size;
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quad_t gpp_start;
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const char *gpp_type;
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unsigned int gpp_version;
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};
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void g_part_geometry_heads(off_t, u_int, off_t *, u_int *);
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#endif /* !_GEOM_PART_H_ */
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